21331322031311 has 8 divisors (see below), whose sum is σ = 21384961379040. Its totient is φ = 21277702847232.

The previous prime is 21331322031233. The next prime is 21331322031319. The reversal of 21331322031311 is 11313022313312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21331322031311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331322031319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2921315 + ... + 7155188.

It is an arithmetic number, because the mean of its divisors is an integer number (2673120172380).

Almost surely, 2^{21331322031311} is an apocalyptic number.

21331322031311 is a deficient number, since it is larger than the sum of its proper divisors (53639347729).

21331322031311 is a wasteful number, since it uses less digits than its factorization.

21331322031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10081825.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21331322031311 its reverse (11313022313312), we get a palindrome (32644344344623).

The spelling of 21331322031311 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred twenty-two million, thirty-one thousand, three hundred eleven".